Summary

Introduction: Aerobic fitness is changing under the influence of, among others, the level of training.

Purpose of the work: The purpose of this study was to assess the level of development of the aerobic capacity of soccer players during the preparatory period.

Material and method: Twenty-four players were tested at the beginning and at the end of the preparatory period. Group of respondents was in the age range 17 - 18 years. Trainings were held three - four times a week and a half - two hours. In the subjects, VO_2max was assessed using the Astrand test.

Results: Average VO_2max at the beginning of the preparatory period was (49.11 ± 7.18) compared with the average value at the end (52.67 ± 6.58). A trend of increasing the oxygen ceiling after the preparatory period has been observed. Comparison of VO_2max measured at the beginning of the preparatory period and at the end of the preparatory period did not show statistically significant differences (p = 0.077)

Conclusions: For players who have been training for five years or more, we have observed high and very high values of the VO_2max parameter. The preparatory period in the test run indicates a trend of increase of the VO_2max, however difference in the value they are not statistically significant. It can be supposed that the level of training effect on the rate of growth VO_2max assessed after the application of a three-month training oxygen. With the increase in the level of training the dynamics of increase of  the VO_2max is getting slower.

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